Blocking Website Access from GDPR Countries

gdpr.php

<?php
/*
Blocking Website Access from GDPR Countries
Author: M.Februriyanto (fb.me/ebo78)
Version: 1.0.0 May 25, 2018
Requires: Cloudflare IP Geolocation - HTTP_CF_IPCOUNTRY - ISO 3166-1 Alpha 2 format
GDPR Country List by: https://gist.github.com/henrik/1688572
Function derivered from: https://etzelstorfer.com/en/check-country-eu-php/
*/

$country_code = $_SERVER["HTTP_CF_IPCOUNTRY"];

if (isGDPR($country_code) === TRUE) {
header( "HTTP/1.0 403 You are prohibited from visiting this website due to GDPR compliance requirements.", TRUE, 403);
die("We're sorry. Our website is currently unavailable in most European countries. 
We recognise you are attempting to access this website from a country belonging to the European Economic Area (EEA) including the EU 
which enforces the General Data Protection Regulation (GDPR) and therefore cannot grant you access at this time.
\n
(403 error.)");
}

function isGDPR($countrycode){
        $gdpr_countrycodes = array(
	'AT', 'BE', 'BG', 'HR', 'CY', 'CZ', 'DK', 'EE', 'FI', 'FR', 'DE', 'GR', 'HU', 'IE', 
	'IT', 'LV', 'LT', 'LU', 'MT', 'NL', 'PL', 'PT', 'RO', 'SK', 'SI', 'ES', 'SE', 'GB', 
	'GF', 'GP', 'MQ', 'ME', 'YT', 'RE', 'MF', 'GI', 'AX', 'PM', 'GL', 'BL', 'SX', 'AW', 
	'CW', 'WF', 'PF', 'NC', 'TF', 'AI', 'BM', 'IO', 'VG', 'KY', 'FK', 'MS', 'PN', 'SH', 
	'GS', 'TC', 'AD', 'LI', 'MC', 'SM', 'VA', 'JE', 'GG'
    );
        return(in_array($countrycode, $gdpr_countrycodes));
    }